21370439

Names of 21370439

• Cardinal: 21370439 can be written as Twenty-one million, three hundred seventy thousand, four hundred thirty-nine.

Scientific notation

• Scientific notation: 2.1370439 × 10⁷

Factors of 21370439

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 689400

Divisors of 21370439

• Number of divisors d(n): 4
• Complete list of divisors:
  1 31 689369 21370439
• Sum of all divisors σ(n): 22059840
• Sum of proper divisors (its aliquot sum) s(n): 689401
• 21370439 is a deficient number, because the sum of its proper divisors (689401) is less than itself. Its deficiency is 20681038

Bases of 21370439

• Binary: 1010001100001011001000111₂
• Hexadecimal: 0x1461647
• Base-36: CQ1JB

Squares and roots of 21370439

• 21370439 squared (21370439²) is 456695663052721
• 21370439 cubed (21370439³) is 9759786808832727914519
• The square root of 21370439 is 4622.8172146431
• The cube root of 21370439 is 277.5052143057

Scales and comparisons

• 21,370,439 seconds is equal to 35 weeks, 2 days, 8 hours, 13 minutes, 59 seconds.
• To count from 1 to 21,370,439 would take you about twenty minutes!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21370439 cubic inches would be around 23.1 feet tall.

Recreational maths with 21370439

• 21370439 backwards is 93407312
• The number of decimal digits it has is: 8
• The sum of 21370439's digits is 29
• More coming soon!